In September 2025, the SEO industry saw major ranking volatility in Google search results. Many websites experienced sudden changes in rankings, traffic, and impressions.
At first, many experts believed this was a Google Core Update in September 2025. However, Google did not officially confirm a new core update.
Instead, the changes were caused by:
The August 2025 spam update (completed in September)
Ongoing improvements in Google ranking systems
Changes in how Google counts impressions
New AI-driven search features
In this guide, you will learn:
What really happened in the Google search ranking update in September 2025
Why impressions dropped in Search Console
How ranking volatility affected websites
What SEO strategies work in 2025
What Happened in September 2025? (Simple Timeline)
Google does not always release one big update. Instead, it makes many small changes.
August 26 – September 22: Spam Update Rollout
Google launched a spam update on August 26, 2025
It targeted:
Low-quality AI content
Spammy backlinks
Thin and duplicate pages
The update finished on September 22
This caused many Google ranking changes in September 2025
Around September 10: Major Reporting Changes
Google removed the &num=100 parameter
Before:
SEO tools could see 100 search results per page
After:
Only 10 results per page
This reduced:
Tracking accuracy
Search Console impressions
Mid-September: AI Search Changes
Google started testing AI-powered search results (AI Mode)
This changed:
How users interact with search
How impressions and clicks are counted
This is why many people saw:
Sudden drops in impressions
Confusing ranking data
Why Did Google Search Console Impressions Drop?
Many websites saw a 30%–60% drop in impressions.
This looked like a ranking loss, but that’s not always true.
1. Bot Traffic Removed
Google filtered fake traffic from:
Rank tracking tools
Bots and scrapers
Result: Lower but more accurate data
2. Removal of &num=100 Parameter
SEO tools could no longer generate large impression data
Deep-ranking pages got fewer recorded impressions
3. AI Search Changes
AI results changed how:
Impressions are counted
Search behavior works
Important Insight
A drop in impressions does NOT always mean:
Ranking loss
Traffic loss
It can be a data reporting change
Ranking Volatility in September 2025
This period showed high ranking volatility across Google search.
Who Was Affected Most?
Health websites (YMYL)
Finance websites
Affiliate sites
AI-generated content sites
What Lost Rankings?
Thin content
Auto-generated pages
Low-value blogs
What Improved?
Expert-written content
Helpful and detailed guides
Trusted websites
Key Insight
Websites with strong EEAT (Experience, Expertise, Authority, Trust) stayed stable or improved.
SEO Signals That Still Matter in 2025
Even with all updates, Google still focuses on core ranking signals:
✔ Helpful Content
Content must:
Solve real problems
Be clear and useful
✔ EEAT (Very Important)
Google values:
Experience
Expertise
Authority
Trust
This is critical for ranking in 2025
✔ Strong On-Page SEO
Clear headings
Good structure
Internal links
Semantic keywords
✔ Technical SEO
Fast website speed
Mobile-friendly design
Secure HTTPS
✔ Backlinks
High-quality links
Relevant websites
What This Means for Your SEO Strategy
Here is how to adapt after the Google ranking update in September 2025:
✔ Don’t Panic About Impressions
Check:
Clicks
Traffic
Conversions
Not just impressions.
✔ Focus on Quality Content
Avoid:
Thin content
AI spam
Create:
Deep, helpful content
Real insights
✔ Use Semantic SEO
Don’t just target keywords.
Also include:
Related topics
Search intent
User questions
✔ Monitor AI Search Trends
Google is moving toward:
AI answers
Smart search results
Your content must be clear and helpful
✔ Build Trust (EEAT)
Add:
Author info
Case studies
Real examples
FAQs (People Also Ask)
Was there a Google Core Update in September 2025?
No official core update was confirmed. Most changes came from the August spam update and system improvements.
Why did my rankings drop in September 2025?
It could be due to:
Spam update impact
Content quality issues
Reporting changes
What is ranking volatility?
Ranking volatility refers to frequent changes in search rankings over a short period.
Does SEO still work in 2025?
Yes. SEO still works, but now focuses more on:
Quality content
User experience
Trust signals
Final Thoughts
September 2025 was not just one update. It was a mix of:
Spam update completion
Ranking system improvements
AI search changes
Reporting updates
That’s why many websites saw ranking fluctuations and data changes
Key Takeaways
Not all drops mean ranking loss
Google is improving how it measures data
AI is changing search behavior
Quality content is more important than ever
Conclusion
To succeed after the Google search ranking update in September 2025, focus on:
Helpful content
Strong SEO basics
Trust and authority
Long-term strategy
This is the best way to handle ranking volatility and grow your website in 2025 and beyond.
